Filtering apparatus



Feb. 13, 1945. G. G. ALLAN FILTERING APPARATUS Filed March v1o, 194s 2 lu F n. l im val-vll 7 INVENTOR Gordon A1121,

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ATTORNEYS Patented Feb. 13, 1945 mTERINGAPPARATUs Gordon G. Allan, Detroit, Mich.

Application March 10, 19.43, Seral`No.478,663

(Granted under the act ,of March 3, lsaspas amended April so, 192s; 3ro o. G. 757) The invention described herein may be manufactured and used byor for-the Government for governmental purposes, without the payment to me of any royalty thereon.

The present invention pertains to a novel'ap paratus intended primarily for the removal of dye and lead compounds fromk gasoline.

In Army operations, as well as on other expeditions, gasoline is needed for cook stoves, blow torches, cleaning metal parts and for other similar purposes. The presence of fumes from leaded gasoline is a, health hazard, particularly in connection with cook stoves where the food is liable to become contaminated. Moreover, the residue of combustion eventually clogs the apertures of the stove burners. The handling of leaded uid for cleaning purposes is likely to in- .iure the skin.

Accordingly, it becomes necessary to carry a supply ofclear, unleaded gasoline in addition to the fuel for the motor vehicles. However, military regulations or other circumstances might disrupt or eliminate the supply of clear gasoline, and in such cases it would be desirable to lter the leaded gasoline.

The principal object of this invention, therefore, is to provide a suitable apparatus for this purpose. The copending application of Frederick E. Neef, Jr., Serial No. 483,348, led April 16, 1943, discloses a filter material for removing the dye and the tetraethyl lead, the latter combining chemically with the material with great affinity. Briefly, this material is an activated clay and preferably a hydrated aluminum silicate activated with sulphuric acid.

The invention herein disclosed is directed more particularly to the mechanical structure for supporting the activated filter, the supply and receiving receptacles and the uid connection among these parts. The incoming fluid is first collected in a pool and then permitted to percolate upward through the activated material.y

Similarly, it is collected in another pool above the material and Withdrawn therefrom to the receiver. The supporting structure is preferably designed to carry standard ve'gallon army cans as the supply and receiving receptacles and to permit easy replacement thereof.

The invention is fully disclosed by way of example in the following description and in the accompanying drawing in which Figure 1 is a side elevation of the apparatus;

Figure 2 is a vertical elevation at right angles to Figure 1;

Figure 3 is a plan view of one of the filter plates;

Figure 4 is a longitudinal section-thereof, on

auxiliary Reference to these views will now be made by use of like characters which are employed to designate correspondingV parts throughout.

The framework of the apparatus consists of a number of uprights I, such as four angle strips secured together by external transverse angle .irons 2 at the top and bottom and at suitable Figures 3 and 4. Each such plate comprises a pair of metal plates 6 having a substantial number of coincidingy apertures I and an intervening lter cloth 8.- These parts are secured together by suitably placed bolts 9. plate unitsv is packed the activated filtering medium which, as previously indicated, may be a hydrated aluminum silicate, -activated by heating or with sulphuric or hydrochloric acid. The filter unit may be inserted between the uprights I, as may be seen in Figure 2.

On the upper support 3 is mounted a suitable receptacle II containing colored, leaded gasoline to be filtered. This may be a standard army five gallon container in inverted position so that the usual vent tube I2 is open at the upper end. The usual cap is replaced by another cap I3 from which extends a rather long pipe I4 having a pet cock I5. This pipe is connected to vthe lower end of the filter unit 5, at the space between the bottom and the lower plate unit 6 9.

A similar receptacle I6 is suitably supported beneath the filter unit. Both receptacles II and I6 are adapted to be inserted between the uprights I, as may be seen in Figure 2. The cap II of the receptacle I6 isremoved, and into the opening is inserted a pipe I8 extending from the upper end of the filter unit 5 or from the space between the top wall thereof and the upper plate unit 6--9. The tubes I4 and I8 are preferably flexible for ready manipulation in changing the receptacles and the filter unit.

In the operation of the device, the pet cock I5 is opened to permit gasoline to flow from the re- Between the filter 2' 2,369,124 itil-3;;

ceptacle I I to the bottom of the fllter unit 5. From here the gasoline percolates upward through the lter body 5 and both plate units 6-9 and enters the space between the upper plate unit and the top of the receptacle 5 whence it ows into pipe I8 by which it is delivered to the lower receptacle I6. The rate of ilow is adjusted at the petcocki in accordance with the contact Vtime required for the complete filtration of the particular gasoline.

The filtration is a chemical action in which the tetraethyl lead combines very see-relywth the activated clay. Consequently this material loses its effectiveness in time and-must-be1-.re``

tion a frame, supporting means on said frame for holding three containers in vertically spaced relationship, a ltering unit comprising one of said containers positioned upon the interme- 5 diate supporting means, a pipe yconnected to the lower portion of the lteringunit and extending `above the upper supporting means, a pipe connected to the upper portion, ofsaidliltering unit and extending below'the intermediate-supportlo ing means, a similar plug connected to the end #of each extended end of each pipe for connect-l ing-said pipes into similar containers positioned symmetrically. above and below said ltering unit, said :plugs being in substantially vertical placed. This is easily done ,o n, disconnecting'i .alignmenp .anchei pipe connected to the upper the pipes I4 and I8.

Although a specic embodiment of :them-vene plug and opening into the upper interior of the container,` positioned upon the upper supportingmeans to vent said upper container, whereby ,liguid carriedin the upper container will ow 20 to the'lower portion of said filtering unit andl ,trom the upper portion pfsaid ,filtering unit t0 

